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(No Model.)

2 Sheets-Sheet; 1. S. BRINKERHOPF.

STANDARD CLAMP FOR CULTIVATORS.

Patented Feb. 16, 1886.

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S. BRINKERHOPF. STANDARD CLAMP FOR GULTIVATORS.

No. 336,506. Patented Feb. 16, 1886:

UNITED STATES PATENT OFFICE.

SAMUEL BR-INKERHOFF, DIP-FREMONT, OHIO, ASSIGNOR TO THE FREMONT OULTIVATOR COMPANY, OF SAME PLACE.

STANDARD-CLAMP. FOR CULTIVATORS.

SPECIFICATION forming part of Letters Patent No. 336,506, dated February 16, 1886.

(No model.)

To all whom it may concern.-

Be it known that I, SAMUEL BRINKERHOFF, a citizen of the United States, residing at Fremont, in the county of Sandusky and State of Ohio, have invented certain new and useful Improvements-in Standard-Clamps; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to letters or figures of reference marked thereon, which form a part of this specification.

This invention relates to fastening devices and clamps for securing cultivator standards or teeth to plow-beams or drag-bars, and for which Letters Patent have been granted to Harlow O. Stahl, No. 270,855, dated January 16. 1883, and No. 252,586, dated January 17, 1882.

This invention consists in the detailed construction of the clamp-plates and adjustingscrews by which the cultivator standard or tooth is held, and in the combination and arrangement of parts, as hereinafter fully described and claimed.

In the drawings, Figure I is a side view of a cultivator-standard attached to a plow-beam and provided with the improved clamps. Fig. II is a plan view of the same. Fig. III is a plan View of the p1ow-beams of a cultivator, showing how the various clamp-plates are attached to them.

Similar letters of reference indicate corresponding parts in all the figures.

A is the cultivator standard or tooth, preferably made of steel-plate bent into shape, and having a U-shaped cross-section, as this is a form which admits of great lightness and strength.

Bis the plow-beam or drag-bar, to which. the cultivator-standard is firmly secured.

O are two plates of metal, forming together a standard attachment, each of which is provided with an opening, 0, corresponding in form to the outline of the cultivator-standard, but of such size that the said standard may fit loosely in it. A boss, 0, is formed at that end of each of the plates next to the round side of the cultivator-standard, and is provided with a screw-threaded hole, through which a setscrew, D, is made to move back and forth when turned. Each plate is continued on one side, and is provided with two holes, c,t-hrough which the bolts E pass and secure the clamp plates 0 firmly in position on the plow-beam.

F is an opening, which is formed in the clamp-plate to lighten it.

f are ribs, which are added to the plate to increase its strength.

The holes 0 may be placed in any position with regard to the opening 0, so that the plates C may be attached to plow-beams which are not at right angles with the axle of the cultivator, but have more or less slope or angle; or the said holes may be elongated and adapted for adjustment as shown in the patents before mentioned to Harlow C. Stahl.

In order that the clamp-plates may secure the standards to plow-beams of the construction shown in Fig. 3, in which each plow-beam consists of two diverging portions, a slight change has to be made in the construction of each pair of plates. This change is similar on each of the plow-beams B.

The clampplates O, which have been previously described as constituting a standard attachment, are designated in Fig. III as the sets of clamps which are located at the rear ends of the plow-beams and on the outer sides thereof, and they have distanceblocks placed between them and the said plow-beams, in order that all the cultivator-standards on either side of the cultivator may be the same distance apart.

The clamp-plates G, which come at the front portion of the plow-beam,have holes 9 in them, through which the bolts pass which secure them in position, and these clamp-plates are placed on the inside of the inwardly-diverging arms of the plow-beams.

In order that the standard may be held so that the cultivator-blade may always be at right angles to the line of draft, and the clampplate bolts at the same time pass through the middle of that portion of the plow-beam to which they fasten the clampplates, the holes g have to be placed at a different angle with regard to the hole through which the standard passes from that clamps.

H are the clamp plates for securing the standard to the plow-beams intermediate between the clamp-plates G and G, and these are placed on the inside of the main part of each plow-beam. These clamp plates have boltholes h in them, which have to be at a different angle from those in plates 0 or G, in order that the intermediate cultivator-blade may also be kept at right angles to the line of draft.

The outlines of the clamp-plates G and H are made to conform with the angle of the boltholes; but otherwise these clamp -plates are exactly the same as those marked 0.

In thepatent to Harlow C. Stahl,No. 252,536, dated January 17, 1882, only one of the clampplates was provided with a setscrew for securing the standard, and this set-screw was made long and applied to the upper clam p-plate. A portion of the defects incidental to this form of construction was removed in the improve ment for which a patent, No. 27 0,855, was granted to the same inventor, and dated January16, 1883. According to this improvement the set-screw for holding the cultivator-stand ard was made short, and was applied to the lower clamp-plate.

In both the above-mentioned cases the standard was obliged to fit exactly within the holes of the clampplates through which it passed, otherwise the set-screw used for holding it would not keep it securely in position.

According to the present invention the upper and lower clamp-plates can be made similar in form. The cultivator-standard does not given to the other sets of them.

uniform in size, and all fitting together of the parts is dispensed with. The construction is consequently rendered cheaper and simpler, while the efficiency of the clamp is increased, because the employment of two screws gives a double amount of bindingpower. It will also be noticed that the vertical adjustment of the standard can now be more easily effected, as from the slackness of fit it is less liable to stick when pushed up farther through the clamp-plates.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, isor V l 1. The combination of the cultivator-standard, the plow-beam, and apair of clamp-plates, 0, each of which has a standard-opening, 0, larger than the cultivator-standard, and with a boss, 0, and set-screw D on the front side of the standard-opening, and the bolts E, for securing the said plates to the upper and lower sides of the said plow-beam, substantially as and for the purpose set forth.

2. A cultivator standard clamp consisting of a pair of plates, each having an opening, 0, larger than the standard, a clampscrew, D, passing through a boss on the front side of the standard-opening, ribs f, extending laterally from the said boss, and opening F,together with bolt-holes c", substantially as and for the purpose set forth.

In testimony whereof I affix my signature in presence of two witnesses.

SAMUEL BRINKERHOFF.

Witnesses:

E. F. DICKINSON, VENELIA oNKLrN. 

